<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="roleList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', 'vcenter', i1 === 0 ? 'bdtop' : '']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过 for 循环 嵌套渲染二级权限 -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="13">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                    >
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>
                        {{scope.row}}
                    </pre> -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="角色操作" width="300px">
          <template slot-scope="scope">
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-edit"
              @click="showEditDialog(scope.row.id)"
              >编辑</el-button
            >
            <el-button size="mini" type="danger" icon="el-icon-delete"
              >删除</el-button
            >
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
      <!-- 编辑用户角色 -->
      <el-dialog
        title="修改用户角色"
        :visible.sync="editDialogVisible"
        width="50%"
        @close="editDialogClosed"
      >
        <el-form
          :model="editForm"
          :rules="editFormRules"
          ref="editFormRef"
          label-width="70px"
        >
          <el-form-item label="角色名称">
            <el-input v-model="editForm.roleName" disabled></el-input>
          </el-form-item>
          <el-form-item label="角色描述" prop="roleDesc">
            <el-input v-model="editForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="editDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editDialogVisible = false">确 定</el-button>
        </span>
      </el-dialog>
    </el-card>
    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close='setRightDialogClosed'
    >
    <!-- 树形控件 -->
    <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key='id' 
    default-expand-all :default-checked-keys='defKeys' ref = 'treeRef'></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights"
          >确 定</el-button
        >
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 控制修改用户角色对话框的显示与隐藏
      editDialogVisible: false,
      // 所有角色列表数据
      roleList: [],
      // 查询到的用户角色对象
      editForm: {},
      editFormRules: {
        roleDesc: [
          { required: true, message: "请输入用户角色", triggle: "blur" },
        ],
      },
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible:false,
      // 所有权限的数据
      rightslist:[],
      // 树形控件的属性绑定对象
      treeProps:{
        label:'authName',
        children:'children'
      },
      // 默认选中的节点ID值数组
      defKeys:[],
    // 即将分配权限的角色id
      roleId:[]
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    // 展示编辑角色的对话框
    async showEditDialog(id) {
      console.log(id);
      const { data: res } = await this.$http.get("roles/" + id);
      if (res.meta.status !== 200) {
        return this.$message.error("查询用户信息失败");
      }
      this.editForm = res.data;
      this.editDialogVisible = true;
    },
    // 监听修改用户角色对话框的关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields();
    },
    // 获取所有角色的列表
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status != 200) {
        return this.$message.error("获取角色列表失败");
      }
      this.roleList = res.data;
      console.log(this.roleList);
    },
    // 修改角色信息并提交
    editRoleInfo() {
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) return;
        // 发起修改数据信息的用户请求
        const { data: res } = await this.$http.put(
          "roles/" + this.editForm.id,
          {
            roleDesc: this.editForm.roleDesc,
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("更新用户角色失败");
        }
        // 关闭对话框
        this.editDialogVisible = false;
        // 刷新数据列表
        this.getRolesList();
        // 提示修改成功
        this.$message.success("更新用户信息成功");
      });
    },
    // 根据 id 删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该文件, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);

      if (confirmResult !== "confirm") {
        return this.$message.info("取消了删除！");
      }

      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("删除权限失败");
      }
      //  this.getRolesList()
      role.children = res.data;
    },
    // 展示分配角色的对话框
   async showSetRightDialog(role) {
     this.roleId=role.id
      // 获取所有权限的数据
     const {data:res} = await this.$http.get('rights/tree')
     if(res.meta.status!==200){
       return this.$message.error('获取权限数据失败')
     }
    //  把获取到的权限数据保存到data中
     this.rightslist = res.data
     console.log(this.rightslist)
      this.setRightDialogVisible=true

      // 递归获取三级节点的id
      this.getLeafKeys(role,this.defKeys)
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组中
    getLeafKeys(node,arr){
      // 如果当前节点node不包含children属性，则是三级属性
      if(!node.children){
        return arr.push(node.id)
      }

      node.children.forEach(item=>this.getLeafKeys(item,arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed(){
      this.defKeys=[]
    },
    // 点击为角色分配权限
   async allotRights(){
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]

      const idStr=keys.join(',')
    const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
    if(res.meta.status!==200){
      return this.$message.error('分配权限失败')
    }
    this.$message.success('分配权限成功')
    this.getRolesList()
    this.setRightDialogVisible = false
    }
  },
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>